this post was submitted on 29 Dec 2023
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Climate - truthful information about climate, related activism and politics.

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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world.  About 1C of total warming.  Second chart:  about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability.  Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases.  About 0.5C of cooling with large error bars from SO2.

Recommended actions to cut greenhouse gas emissions in the near future:

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[–] [email protected] 5 points 1 year ago (1 children)

From a volcano, per the source you linked:

"The Hunga Tonga-Hunga Ha’apai volcano — which violently erupted in January 2022 and blasted an enormous plume of water vapor into the stratosphere – likely contributed to this year’s ozone depletion. That water vapor likely enhanced ozone-depletion reactions over the Antarctic early in the season.

“If Hunga Tonga hadn’t gone off, the ozone hole would likely be smaller this year,” Newman said. “We know the eruption got into the Antarctic stratosphere, but we cannot yet quantify its ozone hole impact.”

[–] [email protected] 4 points 1 year ago (1 children)

Not to make light of the situation, but Hunga Tonga makes me laugh.

[–] [email protected] 3 points 1 year ago

I love the rhythm of this language. "Honga Tonga Honga Ha'apai" is so much fun to say.